13C NMR-Based Approaches for Solving Challenging Stereochemical Problems

Org Lett. 2019 Jun 7;21(11):4072-4076. doi: 10.1021/acs.orglett.9b01248. Epub 2019 May 22.

Abstract

Determining the configuration of proton-deficient molecules is challenging using conventional NMR methods including nuclear Overhauser effect (NOE) and the proton-dependent J-based configuration analysis (JBCA). The problem is exacerbated when only one stereoisomer is available. Alternative methods based on the utilization of 13C NMR chemical shifts, 13C-13C homonuclear couplings measured at natural abundance, and residual chemical shift anisotropy measurements in conjunction with density functional theory calculations are illustrated with a proton-deficient model compound.

Publication types

  • Research Support, Non-U.S. Gov't